Improvement in tan-blowers for smiths  forges



SAME PLACE.

-Letters Patent- No. 107,167, dated September 6, 1870.

IMPRQVEMENT 1N :'N-BLQWERS :PoR sMI'THs' PoRGEs.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern:

Be it known that we, LINDSAY DUsKIN and BEN- JAMm SLEDGE, of Thomasville, in the county ot Da vidson and State of North Carolina, have invented a new and `improved Fan-Mill for Blacksmiths Forges; and we do hereby declare the following to he a full, clear, and exact description of the same, reference being had to the accompanying drawing forming part o t this specification, and'I to the letters of reference marked thereon, in which- Figure 1 represents a side elevation thereof.

Figure 2, a longitudinal vertical section through the center.

The nature of our'invention consists in a fan or blower-chamber, having two discharge apertures, so arranged that two or more forges may be simultaneously supplied with the necessary currents ot' air. from one and the same fan, while the object of our invention is to provide an apparatus, cheap and simple in construction, not liable to get out of order, and

that may be operated by any suitable power.

To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and operation, premising, however, that vthe fan-mill is supposed to be stationed between the forges to be operated.

A represents the trame-worker base of the machine.

B, the fan or blower-chamber.

D D', the discharge-apertures. Y

F, a treadle connected with the wheel G, when it is designed to operate the machine by the foot.

H, a larger driving-wheel, which may be propelled by hand, horse, or other power.

I, the fan-shaft.

K, the fans.

LLa valve to shut, when desired, the discharge D'.

M, uprights supporting the case, and are so groove-d or channeled as to admit the case-supports N toslide. up or down, thus elevating or lowering the case,l at pleasure. .Y

The casing ot' thefan-wheel is constructed in the form shown in figs. 1 and 2, the radius of curvature increasing from the highest and lowest points toward the orifices D and D', zso as to form large blast-chambers B B.-

The fans arel arranged so that the anglev between each .vane is the third part of four right angles. Then, as each vane or fan reachesl the part of the case where-the curvature begins to increase, the preceding fan will have reached the shoulder P.

The blastchanibers B B serve to gire a steady continuous blast.

Having thus fully described our invention,

fhat we claim as new, and desire to secure by Letters Patent, is 1 1. The double fan-blower' herein described, having the case of varying curvature, so as to form blastchambers B B, as described.

2. The three-fan wheel, in combination with the case, of' the form shown in figs. land 2.

' LINDSAY DUSKIN.

BENJAMIN SLEDGE.

Witnesses y JOSEPH W. DUSKIN, GEORGE W. DUsKIN. 

